DE3788972D1 - Magnetic record carrier. - Google Patents

Magnetic record carrier.

Info

Publication number
DE3788972D1
DE3788972D1 DE87105035T DE3788972T DE3788972D1 DE 3788972 D1 DE3788972 D1 DE 3788972D1 DE 87105035 T DE87105035 T DE 87105035T DE 3788972 T DE3788972 T DE 3788972T DE 3788972 D1 DE3788972 D1 DE 3788972D1
Authority
DE
Germany
Prior art keywords
record carrier
magnetic record
magnetic
carrier
record
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE87105035T
Other languages
German (de)
Other versions
DE3788972T2 (en
Inventor
Osamu Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Application granted granted Critical
Publication of DE3788972D1 publication Critical patent/DE3788972D1/en
Publication of DE3788972T2 publication Critical patent/DE3788972T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/725—Protective coatings, e.g. anti-static or antifriction containing a lubricant, e.g. organic compounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/725—Protective coatings, e.g. anti-static or antifriction containing a lubricant, e.g. organic compounds
    • G11B5/7253—Fluorocarbon lubricant
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/725—Protective coatings, e.g. anti-static or antifriction containing a lubricant, e.g. organic compounds
    • G11B5/7253—Fluorocarbon lubricant
    • G11B5/7257—Perfluoropolyether lubricant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/24413—Metal or metal compound
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/24421—Silicon containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
    • Y10T428/31544—Addition polymer is perhalogenated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer
DE3788972T 1986-04-08 1987-04-04 Magnetic record carrier. Expired - Fee Related DE3788972T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61080699A JPS62236135A (en) 1986-04-08 1986-04-08 Magnetic recording medium

Publications (2)

Publication Number Publication Date
DE3788972D1 true DE3788972D1 (en) 1994-03-17
DE3788972T2 DE3788972T2 (en) 1994-08-18

Family

ID=13725575

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3788972T Expired - Fee Related DE3788972T2 (en) 1986-04-08 1987-04-04 Magnetic record carrier.

Country Status (4)

Country Link
US (1) US4786544A (en)
EP (1) EP0240963B1 (en)
JP (1) JPS62236135A (en)
DE (1) DE3788972T2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320241A3 (en) * 1987-12-07 1991-12-11 Hitachi Maxell Ltd. Magnetic recording medium and process for preparing the same
JP2559262B2 (en) * 1988-10-13 1996-12-04 富士写真フイルム株式会社 Magnetic disk
JP2680169B2 (en) * 1989-07-11 1997-11-19 富士写真フイルム株式会社 Magnetic recording media
US5268227A (en) * 1989-07-14 1993-12-07 Fuji Photo Film Co., Ltd. Magnetic recording medium comprising a ferromagnetic metallic then film having a top coat of (a) a hydrocarbonsulfuric or hydrocarbonsulfonic acid or salt and (b) a fluorinated polyether
JPH03105719A (en) * 1989-09-20 1991-05-02 Hitachi Ltd Magnetic recording medium and magnetic memory device formed by using the medium
EP0616321B1 (en) * 1993-03-09 1998-11-25 TDK Corporation Magnetic recording medium
JPH0950623A (en) * 1995-05-30 1997-02-18 Fuji Electric Co Ltd Magnetic recording medium and its production
US6093495A (en) * 1996-08-09 2000-07-25 Seagate Technology, Inc. Water soluble perfluoro polyether salt topcoat lubricants
US6277485B1 (en) 1998-01-27 2001-08-21 3M Innovative Properties Company Antisoiling coatings for antireflective surfaces and methods of preparation
US6080486A (en) * 1998-04-06 2000-06-27 Seagate Technology, Inc. Fluoropolyether topcoat lubricants
US6673429B1 (en) 2000-07-25 2004-01-06 Seagate Technology Llc Magnetic recording media with a multiple-layer lubricant
US6638622B2 (en) * 2001-01-11 2003-10-28 Hitachi Global Storage Technologies Perfluorinated polyethers with metal carboxylate end groups as anti-wetting and corrosion-protective agents
US7060377B2 (en) * 2003-10-20 2006-06-13 Seagate Technology Lubricant film containing additives for advanced tribological performance of magnetic storage medium
US20060105203A1 (en) * 2004-11-15 2006-05-18 Seagate Technology Llc Head disc interface design

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729769B2 (en) * 1974-02-15 1982-06-24
JPS54124708A (en) * 1978-03-20 1979-09-27 Hitachi Maxell Magnetic record medium
US4188434A (en) * 1978-05-15 1980-02-12 Storage Technology Corporation Lubricant for a magnetic member
US4268556A (en) * 1979-01-08 1981-05-19 Minnesota Mining And Manufacturing Company Rigid magnetic recording disks lubricated with fluorinated telechelic polyether
NL189629C (en) * 1979-01-08 1993-06-01 Minnesota Mining & Mfg MAGNETIC RECORD MEDIA LUBRICATED WITH A FLUORATED POLYETHERPOLYMER.
JPS5625232A (en) * 1979-08-06 1981-03-11 Sony Corp Magnetic recording medium
JPS5737737A (en) * 1980-08-15 1982-03-02 Fuji Photo Film Co Ltd Magnetic recording medium
US4404247A (en) * 1982-07-02 1983-09-13 Minnesota Mining And Manufacturing Company Protective covering for magnetic recording medium
DE3370710D1 (en) * 1982-11-19 1987-05-07 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS60151841A (en) * 1984-01-19 1985-08-09 Fujitsu Ltd Manufacture of magnetic disk
JPH0650564B2 (en) * 1984-06-06 1994-06-29 ティーディーケイ株式会社 Magnetic recording medium
JPH0668833B2 (en) * 1984-11-07 1994-08-31 株式会社日立製作所 Magnetic recording medium

Also Published As

Publication number Publication date
EP0240963A2 (en) 1987-10-14
JPS62236135A (en) 1987-10-16
DE3788972T2 (en) 1994-08-18
EP0240963B1 (en) 1994-02-02
EP0240963A3 (en) 1989-09-13
US4786544A (en) 1988-11-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee